Concrete bar.



PATENTED SEPT. 24,1'907.

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CONCRETE Brin.

l No. 887,090.

Specification of Letters Patent.

pplication filed April 12,1907. Serial No. 367,794.

:Patented sept. 24, 1907.

To all @hom 'it may concern:

' Be it known that I, FREDERICK C. WOLF, a citizen of the United States, residing at Youngstown, .in the county of Mahoning and State ofl Ohio, have invented- To this end the invention has in view the formation l e of a rolled bar section embodying a novel and practical aov shape and an effective for and arrangement of binding elements which insure a strong and substantial 'binding for the concrete material, while at the same time securing a maximum reinforcement of the concrete structure whether in the form oi a. column, wall or other body.

The essential features of the invention may be snsceptibl'e to some structural change or modification with-v oui-,departing fronA the scope thereof, but a preferredembodiment o'the invention. is shown in the accompanying drawings,4 in which- Figure l is a perspective view of a reinforcing unit embodying the present invention. Fig. 2 is a side view thereof. Fig. 3 is a cross sectional view oi the same. Fig. 4 is'a perspective view of a modification. Fig. 5 is'an elevation oi a section of the bar showing a further mi'idiiication in the arrangement of the teats.

Like references designate corresponding parts in the though thecorners thereof could be turned olf as desired,l l

without affecting the functions of the unit. Furthermore, the rolled bar section is provided with longitudinally fiuted or channeledv sides 2 producing con-y cavities extending the full length of the `bar section, and in addition to the longitudinal concavities, the bar section is provided on cach side with a multiplicity of offset binding` tents 3. ',lliesc binding tents are formed integrally with the body of the bar during the rolling' 'process and are preferably round lug-like lgnotuiierauces projecting from the bottom of-the concavity'so as to presenta large number of sniallbiuding elements presenting an extensive anchoring and binding area for the concrete material, entirely aside from the binding and anchoringl effect ei the liuted or channeled formation oi the bar sides.

, In. Figs. 1 and 2 oi the drawings' the binding teats are illustrated as preserving n regular order in straight longitudinal rows upon the sides oi the bar, but this may be varied, such for instance, as by staggering the tents throughout the length oi the bar suggested in' Fig. 4 of the drawings without departing from the in`-v is formed with a longitudinal concnvity extending the full,

length ind width thereof, each side being also provided with a plurality of integral binding' tears of materially less width than the width of the har-section.

2. A reinforcingy unit for concrete consisting of o. rolled cross-sectionailly angular bnr-sectioimeach of whose sides is formed with a longitudinal eoncuvity extending; the full length und width thereof. each oils id sides heine; further provided with n pliirnlity of integral binding lents prnjecting.; out of und beyond the cyncnvity and of materially less` width thun thewidtli ot' the bnn-section.

in testimony whereof l hereunto aiiix my signature in the presence oi' ,two witnesses,

` Flinn. c. WOLF.

Witnesses D .'losniir F. WILLIAMS; Criss. M. llimisnr. 

